<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div>
    <input type="text" v-model="n1">
    <input type="text" v-model="n2">
    <input type="button" value="+" @click="f('+')">
    <input type="button" value="-" @click="f('-')">
    <input type="button" value="*" @click="f('*')">
    <input type="button" value="/" @click="f('/')">
    <h3>结果:{{result}}</h3>
</div>
<script src="js/vue.js"></script>
<script>
    let v = new Vue({
        el:"div",
        data:{
            n1:"",
            n2:"",
            result:""
        },
        methods:{
            f(x) {
                //eval()方法可以将字符串以代码的形式执行
                v.result = eval(v.n1+x+v.n2);
            }
        }
    })
</script>
</body>
</html>